9-5x^2=-71

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Solution for 9-5x^2=-71 equation: 


Simplifying
9 + -5x2 = -71

Solving
9 + -5x2 = -71

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -5x2 = -71 + -9

Combine like terms: 9 + -9 = 0
0 + -5x2 = -71 + -9
-5x2 = -71 + -9

Combine like terms: -71 + -9 = -80
-5x2 = -80

Divide each side by '-5'.
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}

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